Home / 685,506.40-1,028,259.60-404,879.20

Finding the Fourth Proportional to 685,506.40, 1,028,259.60 and 404,879.20

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Solution

The fourth proportional to 685,506.40, 1,028,259.60 and 404,879.20 is: 607,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,506.40 : 1,028,259.60 = 404,879.20 : x
  2. Step 2: Convert to fraction form
    685,506.40/1,028,259.60 = 404,879.20/x
  3. Step 3: Cross multiply
    685,506.40x = 1,028,259.60 × 404,879.20
  4. Step 4: Simplify right side
    685,506.40x = 416,320,924,240.32
  5. Step 5: Solve for x
    x = 416,320,924,240.32/685,506.40
  6. Step 6: Final answer
    x = 607,318.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.